地震勘探组合系统统计理论探讨

为了提高信噪比,我们曾应用过各种类型的组合系统,但到目前为止,对组合法的研究还是很不够的。 本文讨论了不同类型组合系统的相关响应,给出了组合系统统计效应更一般的表达式,把表达式建立在严格的理论基础上。它适用于任意类型的组合系统,也适用于水平迭加、迭加偏移等具有动校正的非线性组合系统。通过组合参数的选择,进行弱相关接收或独立接收以提高统计效应,降低相关效应,这是增大信噪比,提高时问剖面可靠性的重要方法。

AN APPROACH ON THE STATISTIC THEORY OF THE ARRAY SYSTEM OF SEISMIC EXPLORATION

For the sole purpose of improving the signal-to-noise ratio, various kinds of array systems have been applied. But what we did in the study of array method so far is still very insufficient.This paper deals with the correlation response of various kinds of arraymethod. A representation of statistic effect of array system which is more common to us is given, i. e. the representation is set up on a strictly theoretical basis. It is available to all kinds of array systems. Also it is applicable to horizontal stacking and stacking migration non-linear array system all of which are possessed of dynamic correction. By way of making an option of array parameters, the weak correlation receiving or single receiving are made so as to get appropriate effect and reduce the correlation effect as well. Undoubtedly, it is an important method to enlarge the signal-to-noise ratio and raise the reliability of time stacking.